Upgrading to Windows Vista Service Pack 1

The day after Service Pack 1 came out my sister told me to upgrade it for her on her laptop. I went ahead and upgraded to Service Pack 1 using Windows Update. After it finished installing and then it restarted, it froze as it was starting back up and I though it was suppose to do that so I left it like that for a while. After I came back to check on the update it was still on the same screen so I decided to turn it off and then turn it back on. After doing that, it went to a recovery screen and after all that, it still didn’t do anything and after restarting it one more time it finally booted up normal. After all that I still gotta say i’m glad I don’t have Vista.